Use cases of Vector3.Orthonormalize()

Hi

What use-cases of Vector3.Orthonormalize() (the one with 2 parameters):

Code (CSharp):

1. public static void OrthoNormalize(ref Vector3 normal, ref Vector3 tangent);

I understand the calculation, but I'm not 100% sure for what the function may be good for?

Thanks!

 

Any time you needed a normal and tangent (say a forward and up vector) that were orthogonal to one another with respect to normal.

Like a vehicle driving through the hills.

Or a roller coaster oriented on its tracks.

They're normalized for convenience, since they'll generally be used for directoinal purposes, and normalized vectors are best used when needing a directional vector.

 

Cool! Thank you - that makes sense ^^
I always thought about mesh-calculations and so on and totally forgot the game's perspective